689760431 has 8 divisors (see below), whose sum is σ = 730819584. Its totient is φ = 648755200.

The previous prime is 689760373. The next prime is 689760433. The reversal of 689760431 is 134067986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689760431 is a prime.

It is a super-2 number, since 2×689760431² = 951538904346611522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689760433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14546 + ... + 39888.

It is an arithmetic number, because the mean of its divisors is an integer number (91352448).

Almost surely, 2^689760431 is an apocalyptic number.

689760431 is a deficient number, since it is larger than the sum of its proper divisors (41059153).

689760431 is a wasteful number, since it uses less digits than its factorization.

689760431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26961.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 689760431 is about 26263.2905592578. The cubic root of 689760431 is about 883.5533115680.

The spelling of 689760431 in words is "six hundred eighty-nine million, seven hundred sixty thousand, four hundred thirty-one".